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Five things you need to know about home testing

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As many as one in three people with Covid are asymptomatic – meaning they have no symptoms of the virus and could spread it without knowing. In settings like schools and colleges that is obviously a concern. But that’s where asymptomatic testing comes in. All secondary school age pupils and secondary school and college staff are able to take tests twice weekly regardless of whether they have symptoms. The first three of these tests happened in school but from the fourth test onwards pupils will take them from home. We’re also asking families and carers with secondary school age children to take tests at home as well. The more tests are carried out, the safer our communities will be. Here are five things you need to know about home testing: 1. Home Testing Kits are Easy to Use Home testing kits are simple and easy to use – and they give a clear result in just 30 minutes. A swab is used to take a sample from the nose or throat, that swab is then dipped in a liquid provided with the test
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Why is my pool heat pump freezing?

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During the winter months, some ice on your pool heat pump is common. However, when the entire unit is covered in ice, your unit will not work properly and may be at risk of damage, so you need to worry. This article focuses on people who want to use a Swimming Pool Heat Pump in the winter. Causes of equipment icing or freezing can include damaged circuits, frozen pools, burst pipes, etc. Ignoring a frozen unit can create major problems. Causes of pool heat pump icing The most common cause of pool heat pump icing is a lack of proper care and maintenance. This can lead to damage to the equipment and eventually cause it to freeze. Here are some other possible causes of your pool heat pump freezing: Damaged unit or system Most heaters come with a defrost unit whose main purpose is to defrost any ice that may have settled in the unit. If the defrost unit fails, the unit will not heat the ice crystals that have frozen in the machine. In addition, the lower temperature in the evaporato
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The use and development of expanded metal mesh

Expanded metal mesh is a variety in the metal screen industry. After the metal sheet is processed by special machinery (expanded steel mesh punching and shearing machine), it is formed into a meshed object. Also known as metal expanded mesh, diamond mesh, iron mesh, metal expansion mesh, heavy expanded metal mesh, pedal mesh, punching plate' aluminum mesh, stainless steel expanded mesh, granary mesh, antenna mesh, filter element mesh, audio mesh, etc. Expanded metal mesh series, with firm holes and long service life, are widely used. They are mainly used in civil construction, batching cement, protection of machinery and equipment, handicraft manufacturing, and high-end speaker grilles. Highway guardrail, sports venue fence, road green belt protection net. Heavy-duty expanded metal mesh can be used for oil tanker pedal nets, heavy machinery and working platforms, escalators and walkways for boilers, oil mines, locomotives, and ships of 10,000 tons. It can also be used in the constr
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How is the maize flour mill machine working?

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I would like to introduce you to the following aspects of the operation of the milling machine. And I think it will help you understand the milling machine and how it works. The maize flour mill machine is process maize kernel to maize flour, maize meal, maize grits. Physical properties remain unchanged, the final product is maize flour, maize meal use for staple food especially in African countries, and the maize grits use for puffing, snack food in many countries. Here is the introduce the maize flour mill machine technical flow for you The maize flour mill machine is full complete line contains cleaning, degerminatong, milling, packing, controlling system. 1.Maize cleaning system: In cleaning system use maize cleaner, destoner, magnetic separator ect to remove the impurities, such as stones, dust, straw to get the clean raw material.The clean raw material transport by bucket elevator to moisture damper. 2. Condition system: Moisture damper: dampener is used to control the water in
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What is The difference between UHMW and HDPE?

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UHMW and HDPE are thermoplastic polymers with a similar appearance. the main difference between UHMW and HDPE is that UHMW contains long polymer chains with very high molecular weight, while HDPE has a high strength to density ratio. UHMW stands for Ultra High Molecular Weight Polyethylene. It is also denoted by UHMWPE. The term HDPE stands for High Density Polyethylene. What is Ultra High Molecular Weight? UHMW is ultra-high molecular weight polyethylene. It is a thermoplastic polymer. This polymer compound contains extremely long polymer chains and has a high molecular weight (about 5-9 million amu). As a result, UHMW has the highest molecular density. However, the appearance of this compound is indistinguishable from HDPE. Properties of UHMW ►It is a tough material. ►Has high impact strength ►No odor and no taste ►High sliding ability ►Crack resistance ►It is highly non-adhesive ►The compound is non-toxic and safe ►It does not absorb water. All polymer chains in UHMW are very long
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Benefits of Using Polymer Insulators in Transmission Lines

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Insulators are used in electrical equipment to support and separate electrical conductors without allowing current to pass through the insulator. Silicone rubber is the most widely used polymeric insulating material for high voltage products. Our polymer insulators offer excellent performance in a wide range of climates and harsh conditions, including coastal, desert and industrial environments. Silicone rubber insulated polymer insulators offer unique properties and are installed all over the world.SAA Grid offers a wide range of insulators which, when combined with our flexible production methods, can provide a polymer insulator to meet your requirements. Polymer insulators are fast becoming the insulator of choice for recent transmission line projects. It is interesting to learn about the benefits of using polymer insulators. Here are some of the benefits of using polymer insulators in transmission lines. 110kV Polymer Suspension Insulator Resistance to shock loads There are a vari
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Basics of Gate Valves That You Should Learn First

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Gate valves are used in a wide variety of types of applications and are suitable for both above and below ground installations. For underground installations, it is paramount to select the correct type of valve to avoid high replacement costs. What is a gate valve? Gate valves are used in a wide range of types of applications and are suitable for both above and below ground installations. For underground installations, it is most important to select the correct type of valve to avoid high replacement costs. Gate valves are designed for full opening or full closing service. They are installed in pipelines as isolation valves and should not be used as control or regulating valves. Gate valves are operated by a rotary motion of the stem, clockwise closed (CTC) or clockwise open (CTO). When the stem is operated, the gate moves up or down on the threaded portion of the stem. The main types of gate valves are slab gate valve an
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